Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v2.4.0.6
Document and Entity Information
3 Months Ended
Mar. 31, 2012
Apr. 30, 2012
Entity Registrant Name QUANTA SERVICES INC  
Entity Central Index Key 0001050915  
Document Type 10-Q  
Document Period End Date Mar. 31, 2012  
Amendment Flag false  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   209,123,748
Convertible Common Stock [Member]
   
Entity Common Stock, Shares Outstanding   3,909,110